http://www.aveda.com/hair-care/invati-thinning-hair-solutions In partnership with Aveda, Mo of MoKnowsHair shares information about thinning hair as well as tips to help strengthen hair. Mo answers your questions and recommends Aveda's Invati system. Hair loss, thinning, and shedding can happen for a number of reasons. Postpartum shedding and thinning happens after pregnancy due to hormones.